I brushed my tips with The Best Glue Ever and used a pair of precision nib tweezers to place the flakes. Now, this was fairly tricky, but the end result is fun I think :) I think you would get the best result with these if you encapsulate them in acrylic when building a false nail. It makes me wish I knew how to!

If you buy these from Born Pretty Store, you get 12 little pots of Mylar flakes for $6.48, with free international shipping.